The pause on her end in reaction to that doesn't involve any relaxing of her grip, though he can enjoy the exasperated huff of air that it does involve as she correctly interprets that implication. (This is not the scavenger hunt for Baedal's wayward boys, Jason, you've taken a wrong turn.) On the other hand, given the city she's in and what Lucius delicately refers to as her 'sideline' - not to mention who and what she is - it's a wonder this is the first time this has happened, and she could've been dealing with something much worse in both motive and outcome.

It doesn't make him trustworthy, but it does make the need to stab him in the thigh with a syringe slightly less pressing. Which doesn't mean she's immediately letting him down:

“Did you need somebody to teach you restraint?”

That's probably not why.